No, it’s not whataboutery. There’s no specific accusation against Zack Polanski. The accusation is that attacks in the media against the green leader are ramping up in the run up to the election. The example was provided as evidence to this.
Whataboutery is more what you’ve just done here, in combination with a moving of goalposts. First you’ve changed the topic from comparing media negative coverage to what the leaders actually did, and then you minimised reform’s actions by comparing them favourably against the greens.
The goal of this is either to defend reform or just to play devil’s advocate, it seems.